Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves

Erik Damgaard Christensen, Stefan Carstensen, Mikael Thyge Madsen, Peter Allerød Hesselbjerg, Christel Jeanty Nielsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The total wave load on a gravity based foundation for offshore wind turbines is influenced by the pore pressure from beneath the structure. The pore pressure is induced by the wave–structure-seabed interaction. Often the uplift force is included in a simplified way in the design of the gravity based foundation. This leads typically to very conservative designs in order to accommodate the uncertainties in the procedure. The experiments shall lead to better prediction models based on for instance CFD model’s with the direct calculation of pressure variations in the seabed and any erosion protection layer. Herewith, it will be possible to get a direct assessment of wave loads on the foundation, also under the seabed level. The study includes experiments as well as numerical analyses. A good agreement between the experimental results and the numerical analyses was found. In the numerical analyses, it was possible to investigate the effect of air content in the pores, which turned out to have an effect on the distribution of the pore pressure.
Original languageEnglish
Title of host publicationProceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36)
Number of pages10
Volume10
PublisherAmerican Society of Mechanical Engineers
Publication date2017
Article numberOMAE2017-62585
ISBN (Electronic)978-0-7918-5778-6
DOIs
Publication statusPublished - 2017
Event36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36) - Trondheim, Norway
Duration: 25 Jun 201730 Jun 2017

Conference

Conference36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36)
CountryNorway
CityTrondheim
Period25/06/201730/06/2017

Cite this

Christensen, E. D., Carstensen, S., Madsen, M. T., Allerød Hesselbjerg, P., & Nielsen, C. J. (2017). Pore Pressure Under A Gravity Based Structure Under The Influence Of Waves. In Proceedings of the 36st International Conference on Ocean, Offshore, and Arctic Engineering (OMAE36) (Vol. 10). [OMAE2017-62585] American Society of Mechanical Engineers. https://doi.org/10.1115/OMAE2017-62585